Home / 13,149.68-18,144.93-7,771.49

Finding the Fourth Proportional to 13,149.68, 18,144.93 and 7,771.49

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Solution

The fourth proportional to 13,149.68, 18,144.93 and 7,771.49 is: 10,723.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.68 : 18,144.93 = 7,771.49 : x
  2. Step 2: Convert to fraction form
    13,149.68/18,144.93 = 7,771.49/x
  3. Step 3: Cross multiply
    13,149.68x = 18,144.93 × 7,771.49
  4. Step 4: Simplify right side
    13,149.68x = 141,013,012.46
  5. Step 5: Solve for x
    x = 141,013,012.46/13,149.68
  6. Step 6: Final answer
    x = 10,723.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.